通过分子模拟,探索酸化调节和依赖于SUMOylation的NPR1对免疫调节器TGA3和WRKY70的 conformational切换
1Department of Life Sciences, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea.
Plant physiology and biochemistry : PPB
|March 8, 2025
概括
与非表达性病原体相关的基因1 (NPR1) 酸化和SUMOylation调节植物免疫力. 分子建模揭示了这些修改是如何控制NPR1的.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物免疫力 植物免疫力
- 后翻译修改 后翻译修改
背景情况:
- 与非表达性病原体相关的基因1 (NPR1) 是植物免疫的关键调节者.
- 通过酸化和SUMOylation调节NPR1功能,但精确的构造变化尚未完全理解.
- 了解这些修改对于破译效应器触发免疫来说至关重要.
研究的目的:
- 阐明NPR1在对酸化和SUMOylation的反应中的结构动力学.
- 研究这些翻译后修改如何影响转录调节器TGA3和WRKY70.0的结合.
- 揭示NPR1作为植物免疫力的主开关的作用背后的原子级机制.
主要方法:
- 基于深度学习的分子建模.
- 分子对接模拟. 分子对接模拟.
- 多纳秒分子动力学模拟 (共2μs).
- 最终状态自由能量计算.
主要成果:
- 在Ser11/15和SUMOylation的酸化稳定了NPR1,通过激活循环调节促进了TGA3结合.
- 在Ser55/59的酸化和SUMOylation稳定NPR1-WRKY70复合体,保持静止状态.
- 酸化抑制了长螺旋体的形成,改变了通信通路,有利于TGA3/WRKY70结合.
结论:
- 酸化和SUMOylation在NPR1中诱导了明显的结构变化,决定了它与TGA3和WRKY70.0.3的相互作用.
- 这些修改微调了植物免疫激活和抑制之间的切换.
- 这项研究为NPR1调节提供了原子洞察力,有助于未来加强植物免疫力的努力.
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